docs: def cleanup_images(self):
          """
          Remove all images created by CONU and remove all hidden images (cached dowloads)
  
          :return: None
          """
          for image in self.list_images():
              if CONU_ARTIFACT_TAG in image.name:
                  image.rmi()
          # remove all hidden images -> causes trouble when pulling the image again
          run_cmd(["machinectl", "--no-pager", "clean"])